Malicious Code Detected in flatmap-stream: A Critical Security Concern
Summary
MAL-2025-20690: Malicious code in flatmap-stream (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The flatmap-stream package is a utility for transforming and flattening streams in Node.js applications. It is widely used for its ability to handle asynchronous operations efficiently. However, the package has recently been identified as containing malicious code, posing significant risks to applications that rely on it.
Vulnerability Detail
The vulnerability in flatmap-stream arises from the inclusion of malicious code that can compromise the security of applications utilizing this package. This code may lead to unauthorized access, data breaches, or other harmful actions within the affected systems. The issue was introduced in version 0 and affects all subsequent versions, making it critical for users to take immediate action.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall flatmap-streamIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a temporary measure, consider removing the flatmap-stream package from your project if it is not essential. Alternatively, you can replace it with a similar package that does not have known vulnerabilities.
Conclusion
The discovery of malicious code in the flatmap-stream package highlights the importance of maintaining secure coding practices and regularly updating dependencies. Users are urged to take immediate action to protect their applications from potential threats.
See every vulnerability recorded for flatmap-stream →
FAQ
flatmap-stream is a Node.js package used for transforming and flattening streams, allowing for efficient handling of asynchronous operations.
The malicious code found in flatmap-stream can lead to unauthorized access and potential data breaches in applications that use this package.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time. Visit Vulert Scanner to check if your application is affected without needing to sign up.
As of now, a patched version has not been released. Users should monitor the package repository for updates and apply them as soon as they are available.
If immediate updates are not possible, consider removing the package or replacing it with an alternative that does not have known vulnerabilities.
Related vulnerabilities
Recent vulnerabilities recorded for flatmap-stream.
